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Docker is now shipped with conflicting (non-namespaced) versions of runc and containerd, the back end components for running containers. The community package for docker has switched to using the discreet packages for those components, so I have done the same for docker-bin. I may re-assess this if the community packages get out-of-sync from what docker is packaging, but as they are not actually part of docker itself, I don't want to do that unless there is need of it.

IMPORTANT: You must stop all containers and plugins BEFORE upgrading to Docker CE 17.12.

Docker CE 17.12 and later won't recognize containers started with previous Docker versions. If using Live Restore, you must stop all containers before upgrading to Docker CE 17.12. If you don't, any containers started by Docker versions that predate 17.12 won't be recognized by Docker after the upgrade and will keep running, un-managed, on the system.